Before Donald Trump Jr. took the microphone to stump for his father in Cedar Rapids, Iowa, on Tuesday, the audience of Republican voters in this important swing state heard from a special guest: President Donald Trump’s Secretary of Agriculture, Sonny Perdue. “I’ve been in Iowa for a few days,” Perdue said, “and lemme tell ya, Biden is running third behind Trump and ‘for sale’ signs.” I don’t know about the signs, but Perdue has spent more than just a few days in Iowa.